Arch Linux Security Advisory ASA-201701-35
==========================================
Severity: Medium
Date : 2017-01-27
CVE-ID : CVE-2017-2583
Package : linux-lts
Type : privilege escalation
Remote : No
Link : https://security.archlinux.org/AVG-150
Summary
=======
The package linux-lts before version 4.4.44-1 is vulnerable to
privilege escalation.
Resolution
==========
Upgrade to 4.4.44-1.
# pacman -Syu "linux-lts>=4.4.44-1"
The problem has been fixed upstream in version 4.4.44.
Workaround
==========
None.
Description
===========
The Linux kernel > 3.6-rc1, when built with Kernel-based Virtual
Machine (CONFIG_KVM) support, is vulnerable to an incorrect segment
selector (SS) value error. It could occur loading values into SS
register in long mode.
A user/process inside a guest host could use this flaw to crash the
guest, resulting in denial of service, or potentially escalate their
privileges inside the guest system on an AMD processor.
Impact
======
A local attacker in a guest host is able to crash the system or
escalate privileges inside the guest on an AMD processor.
References
==========
http://seclists.org/oss-sec/2017/q1/137https://git.kernel.org/linus/33ab91103b3415e12457e3104f0e4517ce12d0f3https://security.archlinux.org/CVE-2017-2583